Air-pump for carbureters.



A. D. ELLIOTT. AIR PUMP FOR UARBURETERS. APPLICATION FILED DEO.31,1907.

Patented May '4, 1909.

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APPLICATION FILED DBO. 31,1907.

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. Patented May Willi econ A. D. ELLIOTT. AIR PUMP FOR GARBURBTERS.

' APPLICATION FILED DBO. 31,1907.

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ALEXANDER DAYTON ELLIOTT, OF VIOLA, ILLINOIS, ASSIGNOR OF ONE-HALF TO HARMON H. FRAZIER, OF ALLIANCE, NEBRASKA.

AIR-PUMP FOE CARBURETE RS.

To all 107mm "it may concern:

Be it known that I, ALEXANDER D. ELLIOTT, a citizen of the United States, residing at Viola, in the county of Mercer and State of Illinois, have invented a new and useful Air-Pump for Carburetors, of which the follm ing is a specification.

ihis invention relates to air pumps of that class usually employed for carbureting air and enriching gas, and has for its principal object to provide a self contained machine, of simple construction which may be readily assembled without the necessity of employing any special mechanical skill.

A further object of the invention is to provide a novel means for automatically suppiymg air under pressure to a carburetor or the like.

A still further object of the invention is to provide an im )roved air pump, the speed of operation of w ich is controlled by the rapidity of gas consumption.

J'ith these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the acconipai'iying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings:Figure 1 is a front elevation of a carbureting apparatus provided with an air pump constructed in accordance with the invention, the air pump being shown in section. Fig. 2 is a transverse sectional view of the same on the line 22 of Fig. 1. Fig. 3 is a sectional plan view on the line 3-3 of Fig. 1. Fig. 4-. is a sectional elevation of the valve mechanism for controlling the movement of the air pump. Fig. 5 is a transverse sectional view of the same. Y

In the form of the air pump here shown the same is illustrated as applied to a carbureter with a specific oil feed, but it is to be understood that this carbureter and oil feed form no part of this invention and the same are intended to be covered by separate applications and are only shown in these drawings as illustrative of any type of carburetor and oil feed for the same.

Specification of Letters Patent.

Application filed December 31, 1907.

Patented May 4, 1909.

Serial No. 408,750.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The mechanism is mounted in a suitable frame, which, in the present instance, includes a plurality of vertically disposed angle bars which are connected at the top by horizontal bars 11, and adjacent the bottom by horizontal bars 12, although any other suitable construction of frame may be adopted in accordance with the location of the machine.

Mounted in the lower portion of the frame is a tank 15, which, in starting the machine into operation, is filled with any suitable liquid, preferably a heavy oil, and below this tank is a second tank 16 into which the oil is forced from the tank through a pipe 17, a pump 18 being preferably employed for this purpose. The pump 18 is further utilized as an air pum so that after the entire contents of the tan 15 have been drained into the tank 16, air may be forced into said tank 16 in order to place the liquid under pressure, a pressure of approximately eighty pounds to the square inch being found suitable for the work of a machine of ordinary size, that is to say, in a machine such as that employed for the supply of gas to an ordinary dwelling house for lighting and cooking purposes.

T he supply of oil under pressure in the tank 16 is utilized for the purpose of operating the air pump.

Mounted on the bars 12 of the frame is an annular liquid tank 19, which forms a seal for the openv lower end of the movable bell 20 of an air pump. To the central portion of the bell is secured a piston rod 21, extending from a piston 22 that is located in a vertical cylinder 23, to which the oil under pressure from tank 16 is admitted by a pipe 24, and when the oil enters the lower portion of the cylinder, the piston will be forced. up raisin the bell 20, whereupon atmospheric air will flow into the bell through a suction lift valve 25 of any ordinary construction. The bell is sufficiently weighted to descend. and force the air outward from the bell through a pipe 26, and this pipe extends upward through the containing tank 27 of an aerometer having a movable bell 28, the upper portion of the pipe 26 being provided with a valve 29 which opens to admit the air to the aerometer 28, and closes when the pressure in the aerometer exceeds that in the bell 20 of the pump.

Leading from the aerometer is a discharge pipe 30 through which the air passes to the carburetin chamber in the manner hereinafter described, and at thelowest portion of this pipe 30 is connected a drip chamber 30 that preferably is formed of glass so that any water of condensation may be lainly seen and this water may be drawn 0' from time to time through a pet cock 31.

The flow of the oil or other fluid under pressure from the tank 16 to the cylinder 23 is under the control of a valve 32, see Figs. 12 and 13. The valve 32 is in the form of an ordinary D valve controlling three ports 33, 34 and 35, and is disposed within a suitable casing 36. Journaled in the upper portion of the casing is a rock shaft 37 to one end of which is connected an arm 38 that works loosely in a recess formed in the upper face of the valve 32. To this shaft is secured a two armed lever 39, and mounted loosely on the shaft is a lever 40 and a gear segment 41, the lever 40 being provided at its free end with. a weight 42 and carrying a projecting pin 43, adjacent its pivotal point, said pin being arranged to engage alternately with the arms of the lever 39. The gear segment 41 has a pair of projecting pins 44 which are arranged to engage with a lug 45 projecting from the rear face of the lever 40, and as the gear segment moves in one direction or the other, one of the pins 44 will, by engagement with the lug 45, carry the lever 40 up to and across the vertical plane of the rock shaft 37, so that said lever may then continue its movement in the same direction by gravity, bringing the pin 43 of the lever into engagement with one or other of the arms of the lever 39, and thus quickly and positively shifting the position. of the valve 32.

The valve mechanism is carried by a bracket 48 in the upper portion of which is journaled a shaft 49 carrying at one end a pinion 50 that meshes with a tooth of the gear segment 41, and at the op osite end of said shaft is a sprocket whee 51, around which passes a link belt 52, the upper por tion of the link belt being guided around an idler sprocket 53 at the upper portion of the frame.

Projecting from the link belt 52 is an arm 54 that is firmly secured to the movable bell 20 of the air pump, so that as said bell moves up and down, the link belt will be operated and the sprocket wheel 51 will be turned in one direction or the other for the purpose of shifting the valve 32.

Leading from the lower portion of the tank 16 is a pipe 56 having a controlling valve 57, and which is connected to two pipes '58 and 59, the pipe 59 leading upward and being connected to a pressure gage 60, while the pipe 58 leads upward and communicates with the port 33 of the valve casing 36. Leading from the port 35 of the valve casing 36 is a pipe 24, which communicates with the lower end of the cylinder 23, as previously described, the valve 32 beingin the position shown in Fig. 4, the oil or other ligz uid under pressure will flow upward through the pipe 53 into the valve chamber, and acting on the upper face of the valve 32 will hold the latter firmly to its seat. During this time the bell 20 of the air pump is descending, and is forcing air into the bell 28 of the aerometer. As the bell 2O descends, it carries down the chain or belt 52 through the connecting arm 54, and this movement is transmitted to the sprocket wheel 51, thereby turning the pinion 50 and gear segment 41. As the segment 41 is moved to the left of Fig. 4, the pin 44 at the right of said segment will engage a lug of the lever 40 and will carry the lever 40 up to and beyond the vertical plane of the axis of the shaft 37, whereupon the weight 42 of the lever will carry the same downward and the pin 43 of said lever will engage with one of the arms of the lever 39, shifting the valve 32 to such position as to uncover the port 35. The oil under pressure then flows from pipe 58, around the valve 32, through the port 35, and pipe 24 to the cylinder 23, and the piston 22 will thereupon be forced up and will raise the bell 20 of the air pump, so that air will be sucked in through the valve 25, while the valve 29 at the discharge end of tire pipe 26 will be closed by the pressure in the aerometer bell. As the bell 20 moves up, it will carry with it the link belt 52, and the valve mechanism will be thereupon moved. in the reverse direction, shifting the valve 32 to the position shown in Fig. 4, and when this occurs the lower end of the cylinder 23 is placed in communication with the tank 15 through the pipe 24, port 35, the valve cavity, port. 34, pipe 63. The weight of the bell then causes descending movement, and the liquid will be forced out of the cylinder 23 into the tank 15, from whence it may be afterward pumped into the pressure tank.

At 71 is shown a form of carbureter adapted to be used with the air pump herein described, and at 91 is illustrated a feed regula tor for such a carbureter. As before mentioned, it is to be understood that these are merely typical of any form of carbureter and feed regulating device that maybe desired to be used with the air pump herein shown, de scribed, and claimed.

I claim 1. In apparatus of the class described, an aerometer, an air pump including a movable bell, a fluid pressure cylinder, a piston arranged therein and connected to the bell, a

valve casing", a valve therein, a fluid pressure reservoir, connections between the reservoir, the casing, and the cylinder, a rock-shaft journaled in the valve casing and connected to the valve, a segment pivoted on the shaft and provided With a pair of projecting; pins, a Weighted lever pivoted on the shaft and provided With a lug arranged. to be engaged alternately by the pins, said levers effecting quick shifting of the valve and a means actuated by the bell for moving said segment.

2. in apparatus of the class described, an aerometer, an air pump including a tank, and a movable bell, said air pump communicating with the aerorneter, a liuid pressure cylinder, a piston arranged therein and connected to the bell, a fluid. pressure reservoir, a valve casing, a valve therein, connections between the reservoir, the valve casing, and the cylinder, a liquid reservoir forming an initial supply for the fluid pressure reservoir, an exhaust connection between the valve casing and said liquid reservoir, and means operable from the bell for actuating said valve.

Inapparatus of the class described, an

aerometer, an air pump connected to the aeroineter, and including a tank, and a movable bell, a fluid pressure cylinder, a piston arranged therein and connected to the bell, a fluid pressure reservoir, a valve casing, a

valve therein, connections between the reservoir, the valve casing, and the cylinder, a rock shaft journaled in the valve casing and connected to the valve, a gear segment pivoted on the shaft and provided With a pair of projecting pins, a Weighted lever pivoted. on the shaft and provided With a lug arranged to be engaged alternately by the pins, said lever effecting quick shifting of the valve, a pinion engaging the gear segment, a shaft carrying the pinion, a sprocket Wheel on the shaft, a link belt passing around said sprocket Wheel, and means for connecting the link belt to said bell.

In testimony that I claim the foregoing as my oWn, I have hereto affixed my signature in the presence of two Witnesses.

ALEXANDER DAYTON ELLIOTT.

vi itnesses JAS. MoFATn, J. G. SUMMERS. 

